I also want to mention that the large end caps you are seeing weren't bonded to the hull at all- there was a small Ti flange epoxied to the hull, and then the large domes were bolted to that. The front, with the window, was unbolted and rebolted every time for ingress/egress.

There is no way that CF epoxied to thick Ti is going to make a strong enough bond that it will deform the Ti when it detaches. In this case, the geometry of that "glued" joint was such that it was forced together by the pressure underwater, rather than pulled apart- so it was not necessary for it to have any real strength other than for holding the end caps on at the surface, and filling voids to make it seal.